Railroading requirement 8b states:
1. Visit a railroad museum, historical display, or a prototype railroad-sponsored public event. With permission, photograph, videotape, or sketch items of interest. Explain what you saw and describe your photos, sketches, or videotape.
2. Purchase tickets and ride a scenic or historic railroad. Under supervision, [...]

Amtrak Schools on Trains
Although intended for schools, Amtrak is happy to extend this to Boy Scouts. For $12 round-trip, Scouts can travel to Portland and back. With advance preparation (worksheets and aids), and a tour of Union Station, Scouts should be able to complete their badges on the 3 hour trip down and [...]